Treatise on Purgatory

The Treatise on Purgatory gathers the teaching of Caterina Fieschi Adorno (1447–1510), a Genoese noblewoman who, after a sudden conversion in 1473, spent the rest of her life nursing the sick at the Pammatone hospital in Genoa and eventually directed it. She left no writings in her own hand. The treatise was assembled by her followers, among them her confessor Cattaneo Marabotto and the notary Ettore Vernazza, and printed in Genoa in 1551 as part of the volume recording her life and doctrine, alongside the Spiritual Dialogue. Its origin was not academic debate but her own interior experience: the opening lines state that this soul, while still in the body, found herself placed in the purgatory of God's burning love, and from that place came to understand what the souls after death undergo.

The treatise's central move is to relocate purgatory from a courtroom to a love story. The souls there are not held against their will under sentence; they throw themselves into the fire freely, because they see the impediment that stands between them and God and cannot bear it. Their suffering is real, greater than any pain on earth, yet their joy is exceeded only by that of the blessed in heaven, and the two coexist without contradiction. Catherine's governing image is rust on metal: sin has left a crust that love burns away, and as the rust diminishes the soul is ever more exposed to the fire, so that the pain lessens while the fire itself remains constant. She compares the soul to someone starving who can see bread but not yet reach it. The souls do not look back at their sins, do not reflect on themselves, and are conformed entirely to God's will, wanting nothing but what he wants. The last pages turn abruptly toward the living, urging that the small purgations we can accept now, in time, are far lighter than what the soul will choose for itself later.

The work has mattered because it describes purgatory from the inside, as an experience of divine love rather than a doctrine to be defended, and it has drawn readers well beyond those who hold the doctrine. Friedrich von Hügel built his major study The Mystical Element of Religion around her, and Benedict XVI devoted a 2011 general audience to her, stressing that in her teaching purgatory is an inner fire rather than a place. For anyone who has felt the gap between the love they know they owe God and the self that keeps getting in the way, the treatise is uncomfortably exact.

Who should read this: those wrestling with how divine judgment and divine mercy can be one act, spiritual directors, and readers of Dante, Newman, or von Hügel who want the mystical source behind the poetry. It is not for anyone seeking a systematic defense of the doctrine or a map of the afterlife; Catherine offers neither, only the fire as she knew it.